Aim: How to plot or graph data

Slides:

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Presentation transcript:

Aim: How to plot or graph data Do Now: Explain the difference between Independent and Dependent variables.

Graphing and Analyzing Data Identify dependent and independent variables Dependent variable – the variable that is being observed during an experiment. (y-axis) Independent variable – the variable that is being changed during an experiment. (x-axis)

Graphing and Analyzing Data Cont. Labeling the graph Title the graph Label the y-axis (dependent variable) and x-axis (independent variable) Direct relationship; “as one variable increases, the other variable increases” and vice versa Indirect or inverse relationship; “as one variable increases, the other variable decreases” and vice versa Relationships

Determining slope of best-fit line 1. Prepare a scatter plot of the data. 2. Using a ruler, draw a straight line (best-fit line) so that the plotted points are as close to the line as possible. 3. Find two points that you think will be on the "best-fit" line. 4. Calculate the slope of the line through your two points.

x1= 1.4 and x2= 3.4 Y1 = 100 and Y2= 300

Plotting the Data 1. Choose an appropriate title 2. What scale will you use? 3. Label intervals; include units